Floor-scraping machine.



INVENTEIF Samuel flrew Patented Nov. 2

S DREW FLOOR SGRAPING MACHINE. APPLICATION FILED DBQ. 23. 1 07. 938,652@

a; {WZZCL SAMUEL DREW, OF ROCHESTER, NEW YORK.

FLOOR-SCRAPING MACHINE.

Specification of Letters Patent.

Patented Nov. 2, 1909.

Application filed December 23, 1907. Serial No. 407,651.

To all whom it may concern:

Be it known that I, SAMUEL DREW, a citizen of the United States, and a resident of Rochester, in the county of Monroe and State of New York, have invented a new and Improved F loor-Scraping Machine, of which the following is a specification.

This invention relates to that class of floor scrapers adapted to operate upon floors in a way to prepare the same for sandpapering and the final finishing process.

The purpose of my present invention is to provide a machine of the character described in which the knife shall be automatically raised from the floor during the inoperative travel of the machine and also automatically brought into proper engagement with the floor during the operative travel of the machine, such results being secured by mechanism under the control of the handle in such a way that the direction in which the machine is moved by the handle determines the relative positions of the parts in a way to secure the above mentioned results.

The accompanying drawings illustrating a floor scraping machine in accordance with my present invention, are as follows Figure l is a side elevation of the ma chine with the wheel toward the observer removed and with part of the other wheel broken away, and with the parts of the machine shown in the relative positions which they assume during the inoperative travel of the machine, which in Fig. 1 is toward the right. Fig. 2 is a view similar to Fig. l, but with the parts comprising the main body portion of the machine shown in their operative positions which they assume when the machine is being drawn to the left. Fig. 3 is a view of the main bcdy portion of the machine as seen from the left. Fig. -ls a top or plan view of a part of the central portion of the frame work of the machine about the main shaft E thereof. Fig. 5 is a plan view of the right hand end of the machine, being the end carrying the knife. Fig. 6 is a plan view of the upper portion of the handle.

Similar letters refer to similar parts throughout the several figures of drawing.

Referring to the drawings,the main support for the operative parts of my machine consists of the two main wheels P each independently revoluble upon a main shaft'E and held thereon with the frame work B between them by means of any suitable mechanism, such, preferably, as cotter pins, not shown. The shaft E is also revoluble through. the frame work B. This frame work B is angular in conformation and has, as indicated in Fig. 4 on the inside, bosses Z2 to strengthen the same at the center and to furnish increased bearing surfaces for the shaft E. This frame work B has between the side members thereof connecting webs Z) and 6 as indicated in dotted lines in Figs. 1 and Between the side members of the frame B at the right hand end thereof there is pivotally supported upon a rod 6 the adjustable knife-carrying plate T having ears 2; thereon extending between the side members of the frame B and through suitable holes therefor in which this rod e extends. A U-shaped member has its ends articulating with the free ends of the links t upon screws, as indicated in Figs. 1, 2 and 5, and such links t are pivotally supported from the sides of the frame B upon suitable screws, as indicated also in Figs. 1, 2 and 5. An adjusting screw t is threaded through the main portion of this member t and is prevented from longitudinal movement through the hole therefor in the upper end of the knife-carrying plate T by means of a washer on the under side of such plate, and a cotter pin, as shown in Figs. 1 and 2, may be used to hold the washer in place, and between such washer and the head of the screw it, the upper end of the knife-carrying plate T is secured in such a way as to permit of the free rotation of the screw 25 to adjust, angula-rly with reference to the frame of the machine, the knife-carrying plate T. The lower end of this knife carrying plate T has secured thereto the usual scraping knife U held in place by means of bolts u extending through the cap plate U To the knife plate T there is secured an ear 9 projecting upwardly and to the right, and pivotally secured to which is seen the upper end of the bolt 9 having threaded thereon the cylinder G which may be adjustably secured on the bolt g by means of a jam nut, as indicated in Figs. 1, 2 and 5, and in the lower end of this cylinder G there is secured a short cylinder of rubber 9 adapted to engage the floor before the knife U and in such a way as to prevent the knife U from engaging ber.

1 at its center.

Articulating with and between the left hand ends of the side members of the frame B and upon the rod 6 is seen the link L, the upper end of which is bifurcated and articulates on the rod 6 with the lever C as seen This lever C has lateral extensions near its middle adapted to enter between the bifurcated upper end of the link L, and it also has lateral extensions at its ends, those at its lower end adapted to enter between and articulate with the side members of the frame work D upon a rod 6 This rod 6 extends also through and is revoluble in the spring engaging members a which may, if desired, be formed-integrally upon the outside of the side members of the frame D near their upper left hand corners. These spring supporting members a have downward extensions cylindrical in form and adapted to engage within the springs S, the other ends of which engage over similar spring supporting members a comprising bearings for the rod 6 extending also through the roller R, which may or may not be rotatably secured upon the rod 6 as desired. The rod 0 and bearings 64 are held in place by any suitable means such as cotter pins or like devices, not shown,so also are the rods 6 and 6 already described. The springs S comprise a yielding support for the left hand end of the frame D. The lateral extensions at the upper end of the lever C engage between the iron straps h secured on the sides of the h-andle H at its lower end and a suitable rod 6*, which may be held in place also by cotter pins, extends through suitable holes therefor in the lower ends of the side members h of the handle H and through the upper end of the lever C, thus permitting the handle H to articulate with the lever C at its upper end.

A rod Q, has an eye 9 on its left hand end engaging within a suitable slot therefor in the upper end of the lever C and articulates upon the rod 6 The left hand end of this rod Q, extends through an upward projection (Z formed on the cylinder al within which shaft E is freely revoluble, serving as a connecting member between the side members of the frame D and with which such cylinder d is preferably formed integrally. Between the side members of this frame work D there extends a connecting web d, as

indicated in dotted lines in Figs. 1 and 2, and the frame work D is widened out each way at a point to the left of the wheels P so that frame work D is considerably wider at its left hand end. The downward projections d of this frame work D are stiffened by means of the laterally extending webs (Z as seen, and through suitable slots therefor in these downward extensions d of the frame work D there extend tongues on the spring engaging members a, forming a guiding means for such members a when the left hand end of the frame D is forced downwardly against the action of the springs S. The right hand end of the rod Q has thereon a washer and two jam nuts, as shown, whereby the motion to the left of the upper end of the lever C may be adjustably limited while the spring S operates to hold such lever C in the position indicated in Fig. 1.

Through suitable eyes i on the upper side of the handle H there extends a rod I having at its upper end a lateral extension, as indicated, by means of which such rod may be operated. A hook 1' tends to hold the upper end of such rod I in the position shown in full lines in Fig. 6, but the upper end of such rod I may be disengagedfrom this hook 2' and moved to the position indicated in dotted lines at 1 and in engagement over the pin 6 The lower end of this rod I engages and articulates with an ear on the upper ed e of the latch V articulating on the end of the rod 6 toward the observer in Figs. 1 and 2. There is adjustably secured on the side of the frame D toward the observer in Figs. 1

and 2, as seen, alatch plate V adjustably held in place by means of a screw, as seen, extending through a slottherefor in such plate V and threaded into the frame D. This latch plate V is adapted to be engaged by the latch V when the handle H is drawn to its extreme left hand position, as seen in Fig. 2, and this latch V may be either disengaged from the latch plate V by a pull exerted upon the lateral extension of the upper end of the rod I, or such latch may be held in its inoperative position, indicated in dotted lines at V in Fig. 1, when the rod I is moved to the position indicated in dotted lines at I in Fig. 6, and in engagement over the pin 7?.

In using my machine, the knife U is properly adjusted and secured upon a knife plate T in the manner already described and the motion to the left of the upper end of the lever C is properly adjusted by means of the jam nuts 1" at the right hand end of the rod Q, then upon pushing the machine from the left and toward the right, the parts are caused to assume the positions indicated in Fig. 1 with the knife U raised from the floor.

The buffer member Gr prevents a marring of the base which might occur without its use when the machine is moved'to the extreme side of the room, the floor of which is to be dressed. Then upon drawing the handle H to the left, the parts are caused to assume the positions nearly as indicated in Fig. 2, except that the buffer G first prevents the knife U from engaging the floor, but as the machine is drawn to the left, this bufier member G tilts over and permits the knife U to gradually engage with the floor, preventing the unsightly marks which would occur without the use of the bufier, which is'shown in Fig. 2 as having reached that position where the knife is fully in engagement with the floor. The motion to the left of the handle H swings the lever C over to the left raisin as clearly indicated in Figs. 1 and 2,

the left hand end of the frame work B and tending to raise the wheels P from the floor by impressing an adjustable amount of the weight of such wheels upon the knife U and upon the rear end of the frame D. The rear end of the frame D is, however, yieldably supported from the floor by means of this connection already described with the roller R and the pressure exerted upon the rear end of this frame D, it willat once be seen, is dependent upon the amount of motion to the left of the upper end of the lever C, which in turn is adjustably limited by the jam nuts 7". There is thus provided a ready means for adjusting the proportion of the weight of the wheels P that is'supported from the knife U and thereby the pressure exerted on such knife.

The normal pull upon the handle H in operating the machine tends to keep the parts in the positions indicated in Fig. 2 with the knife firmly and in constant and proper engagement with the floor. If, however, it is desired, the latch V may be made use of in the manner already described and the point of operative engagement of this latch V with the latch plate V is adjustable to meet the varying conditions effected by the adjustment of the jam nuts 1".

In using my machine, the same is pushed by the operator to the edge of the room so that the buffer G preferably engages lightly with the base and then the machine is drawn to the desired distance away from the side wall of the room by the handle H.

From the foregoing description of my floor scraping machine, it is believed that the construction and operation thereof are sufiiciently clear to call for no further explanation.

hat I claim is 1. In a floor scraper, a roller weight revoluby connected with a frame pivotally supported therefrom; a scraper knife mounted upon one end of such frame; an operating handle connected to the machine and means, independent of any upward or downward pressure exerted on the handle by the operator, whereby, when the scraper is moved in one direction by such handle, the frame is tilted on its support to raise the knife end thereof from the floor and whereby also, when the scraper is moved in the opposite direction by the handle, the frame is tilted to force the knife into engagement with the floor with a pressure representing a part of the weight of such roller weight.

2. In a floor scraper, a roller weight revolubly connected with a frame pivotally supported therefrom; a scraper knife mounted upon one end of such frame; an operating handle connected to the machine; means, independent of any upward or downward pressure exerted on the handle by the operator, whereby, when the scraper is moved in one direction by such handle, the frame is tilted on its support to raise the knife end thereof from the floor and whereby also, when the scraper is moved in the opposite direction by the handle, the frame is tilted to force the knife into engagement with the floor with a pressure representing a part of the weight of such roller weight and yieldable and elastic means sustaining such pressure.

3. In a floor scraper, a roller weight revolubly connected with a frame pivotally supported therefrom; a scraper knife mounted upon one end of such frame; an operating handle connected to the machine; means, independent of any upward or downward pressure exerted on the handle by the operator, whereby, when the scraper is moved in one direction by such handle, the frame is tilted on its support to raise the knife end thereof from the floor and whereby also, when the scraper is moved in the opposite direction by the handle, the frame is tilted to force the knife into engagement with the floor with a pressure representing a part of the weight of such roller weight and means for adjusting the proportionate part of the weight of such roller weight impressed upon the knife when in engagement with the floor.

4. In a floor scraper, a roller weight revolubly connected with a frame pivotally supported therefrom; a scraper knife mounted upon one end of such frame; an operating handle connected to the machine; means, independent of any upward or downward pressure exerted on the handle by the operator whereby, when the scraper is moved in one direction by such handle, the frame is tilted on its support to raise the knife endthereof from the floor and whereby also, when the scraper is moved in the opposite direction by the handle, the frame is tilted to force the knife into engagement with the floor with a pressure representing a part of the weight of such roller weight; means for adjusting the proportionate part of. the weight of such roller weight impressed upon the knife when in engagement with the floor and yieldable and elastic means sustaining such pressure.

5. In a floor scraper, a roller weight revolubly connected with a frame pivotally supported therefrom; a scraper knife mounted upon one end of such frame; an operating handle and an auxiliary frame connected to the main frame and connections between such auxiliary frame, such handle and such main frame whereby, independent of any upward or downward pressure exerted on the handle by the operator, as such scraper is moved in one direction by such handle the knife end of such main frame is raised and whereby also, independent of any upward or downward pressure exerted on the handle by the operator, when such machine is moved in the other direction by such handle, the knife on the main frame is forced into engagement with the floor with a pressure representing a part of the weight of such roller weight.

6. In a floor scraper, a roller weight revolubly connected with a frame pivotally supported therefrom, a scraper knife mounted upon one end of such frame; an operating handle; an auxiliary frame connected to the main frame and connections between such auxiliary frame, such handle and such main frame whereby, independent of any upward or downward pressure exerted on the handle by the operator, as such scraper is moved in one direction by such handle, the knife end of such main frame is raised and whereby also, independent of any upward or downward pressure exerted on the handle by the operator, when such machine is moved in the other direction by such handle, the knife on the main frame is forced into engagement with the floor with a pressure representing a part of the weight of such roller weight and yieldable and elastic means sustaining such pressure.

7. In a floor scraper, a roller weight revolubly connected with a frame pivotally supported therefrom; a scraper knife mounted upon one end of such frame; an operating handle; an auxiliary frame connected to the main frame and connections between such auxiliary frame, such handle and such main frame whereby, independent of any upward or downward pressure exerted on the handle by the operator, as such scraper is moved in one direction by such handle, the knife end of such main frame is raised and whereby also, independent of any upward or downward pressure exerted on the handle by the operator, when such machine is moved in the other direction by such handle, the knife on the main frame is forced into engagement with the floor with a pressure re resenting a part of the weight of such ro ler weight and means for adjusting the proportionate part of the weight of such roller weight impressed upon the knife when i in engagement with the floor.

8. In a floor scraper, a roller weight revolubly connected with a frame pivotally supported therefrom; a scraper knife mounted upon one end of such frame; an operating handle; an auxiliary frame connected to the mainframe and connections between such auxiliary frame, such handle and such main frame whereby, independent of any upward or downward pressure exerted on the handle by the operator, as such scraper is moved in one direction by such handle, the knife end of such main frame is raised and where by also, independent of any upward or downward pressure exerted on the handle by the operator, when such machine is moved in the other direction by such handle, the knife on the main frame is forced into engagementwith the floor with a pressure representing a part of the weight of such roller 7 weight; means for adjusting the proportion- 7 ate part of the weight of suchroller weight impressed upon the knife when in engagement with the floor and yieldable and elastic means sustaining such pressure.

9. In a floor scraper, a roller weight revolubly connected with a frame pivotally supported therefrom; a scraper knife mounted upon one end of such frame; an operating handle and an auxiliary frame pivotally connected to the main frame and connections between such auxiliary frame, such handle and such main frame whereby, independent of any upward or downward pressure exerted on the handle by the operator,

as such scraper is moved in one direction by such handle, the knife end of such main frame is raised and whereby also, inde-- pendent of any upward or downward pressure exerted on the handle by the operator, when such machine is moved in the other direction by such handle, the knife on the main frame is forced into engagement with the floor with a pressure representing a part of the weight of such roller weight. I

10. In a floor scraper, a roller weight revolubly connected with a frame pivotally supported therefrom; a scraper knife mounted upon one end of such frame; an operating handle; an auxiliary frame pivotally connected to the main frame and connections between such auxiliary frame, such handle and such main frame whereby independent of any upward or downward pressure exerted on the handle by the operator, as the scraper is moved in one direction by such on the handle by the operator, when such machine is moved in the other direction by such handle, the knife on the main frame is forced into engagement with the floor with a pressure representing a part of the weight of such roller weight and yieldable and elastic means sustaining such pressure.

11. In a floor scraper, a roller weight revolubly connected with a frame pivotally supported therefrom; a scraper knife mounted upon one end of such frame; an operatlng handle; an auxiliary frame pivotally connected to the main frame and connections between such auxiliary frame, such handle and such main frame whereby, independent of any upward or downward pressure exerted on the handle by the operator, as such scraper is moved in one direction by such handle, the knife end of such main frame is raised and whereby also, independent of any upward or downward pressure exerted on the handle by the operator, when such machine is moved in the other direction by such handle, the knife on the main frame is forced into engagement with the floor with a pressure representing a part of the weight of such roller weight and means for adjusting the proportionate part of the weight of such roller weight impressed upon the knife when in engagement with the floor.

12. In a floor scraper, a roller weight revolubly connected with a frame pivotally supported therefrom; a scraper knife mounted upon one end of such frame; an operating handle; an auxiliary frame pivotally connected to the main frame and connections between such auxiliary frame, such handle and such main frame whereby, independent of any upward or downward pressure exerted on the handle by the operator, as such scraper is moved in one direction by such handle, the knife end of such main frame is raised and whereby also, independent of any upward or downward pressure exerted on the handle by the operator, when such machine is moved in the other direction by such handle, the knife on the main frame is forced into engagement with the floor with a pressure representing a part of the weight of such roller weight; means for adjusting the proportionate part of the weight of such roller weight impressed upon the knife when in engagement with the floor and yieldable and elastic means sustaining such pressure.

13. In a floor scraper, a roller weight revolubly connected with a frame pivotally supported therefrom; a scraper knife mounted upon one end of such frame; an operating handle and an auxiliary frame elastically and yieldably supported from a floor engaging roller and connections be tween such auxiliary frame, such handle and such main frame whereby, independent of any upward or downward pressure exerted on the handle by the operator, as such scraper is moved in one direction by such handle, the knife end of such main frame is raised and whereby also, independent of any upward or downward pressure exerted on the handle by the operator, when such ma chine is moved in the other direction by such handle, the knife on themain frame is yieldably forced into engagement with the floor with a pressure representing a part of the weight of such roller weight impressed thereon and on such auxiliary frame and varying according to the yielding of the elastic and yieldable support for the auxiliary frame.

14. In a floor scraper, a roller weight revolubly connected with a frame pivotally supported therefrom; a scraper knife mounted upon one end of such frame; an operating handle; an auxiliary frame elastically and yieldably supported from a floor engaging roller and connections between such auxiliary frame, such handle and such main frame whereby, independent of any upward or downward pressure exerted on the handle by the operator, as such scraper is moved in one direction by such handle, the knife end of such main frame is raised and whereby also, independent of any upward or downward pressure exerted on the handle by the operator, when such machine is moved in the other direction by such handle, the knife on the main frame is yieldably forced into engagement with the floor with a pressure representing a' part of the weight of such roller weight impressed thereon and on such auxiliary frame and varying according to the yielding of the elastic and yieldable support for the auxiliary frame and means for adjusting the propor tionate part of the weight of such roller weight impressed thus upon the knife when in engagement with the floor.

15. In a floor scraper, a roller weight revolubly connected with a frame pivotally supported therefrom; a scraper knife mounted upon one end of such frame; an operating handle; an auxiliary frame elastically and yieldably supported from a floor engaging roller and connections between such auxiliary frame, such handle and such main frame whereby, independent of any upward or downward. pressure exerted on the handle by the operator, as such scraper is moved in one direction by such handle, the knife end of such main frame is raised and whereby also, independent of any upward or downward pressure exerted on the handle by the operator, when such machine is moved in the other direction by such handle, the knife on the main frame is yieldably forced into engagement with the floor with a pressure representing a part of the weight of such roller weight impressed thereon and on such auxlllary frame and varying according to the yielding ""of the elastic and yieldable support for the I euxiliary frame on the end of the main auxiliary frame and means for adjusting frame opposite the'knife.

the proportionate part of the Weight of such roller Weight impressed thus upon the knife SAMUEL DREW When in engagement with the floor, such last Witnesses: V

named means comprising mechanism for ad- LOTTLE Woon,

justing the upward pressure exerted by such OSBORNE F GURN-EY. 

